2. home-theater
  3. 1391200601

Marantz AV7701

I am experiencing horrible humm issues with my 7701 setup.
7701 is connected via XLR to 5 mono amps. Combination of Bryston and Wyred.
The 7701 when connected creates a humm noise independently of volume. The higher the amp gain and speaker sensitivity the higher the noise. I have a suspicion there is some wrong with grounding or what have you?
All units are powered and grounded via a BELKIN Power Unit.
Any ideas? I am ready to ship the 7701 back but wanted to get your input maybe i'm missing something...
Thx
tsulzbacher

Showing 1 response by tls49

tls49's avatar
tls49
1,351 posts
 

Here are a couple of choices for the ground loop isolator you need.

http://www.cs1.net/products/jensen_transformers/VRD-1FF.htm

http://www.mcmelectronics.com/product/DISTRIBUTED-BY-MCM-4170-/33-8700

They usually cost $25 and up, so the one at MCM is definitely cost effective, and the reviews are good.
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